A typical human skeleton consists of 206 bones. Bones are constantly being broken down and rebuilt. If this process is altered, bones can break down and re-form abnormally and in ways that compromise the integrity of the skeleton. Paget’s di...

True muscle weakness means that full effort does not produce a normal muscle contraction or movement. A voluntary muscle contraction is generated when the brain sends a signal through the spinal cord and nerves to a muscle.